mirror of
https://github.com/SELinuxProject/setools
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128 lines
4.6 KiB
Python
128 lines
4.6 KiB
Python
# Copyright 2014, Tresys Technology, LLC
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#
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# This file is part of SETools.
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#
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# SETools is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as
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# published by the Free Software Foundation, either version 2.1 of
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# the License, or (at your option) any later version.
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#
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# SETools is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with SETools. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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from policyrep.rule import InvalidRuleUse
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import rulequery
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class RBACRuleQuery(rulequery.RuleQuery):
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"""Query the RBAC rules."""
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def __init__(self, policy,
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ruletype=[],
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source="", source_regex=False, source_indirect=True,
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target="", target_regex=False, target_indirect=True,
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tclass="", tclass_regex=False,
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default="", default_regex=False):
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"""
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Parameters:
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policy The policy to query.
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ruletype The rule type(s) to match.
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source The name of the source role/attribute to match.
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source_indirect If true, members of an attribute will be
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matched rather than the attribute itself.
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source_regex If true, regular expression matching will
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be used on the source role/attribute.
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Obeys the source_indirect option.
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target The name of the target role/attribute to match.
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target_indirect If true, members of an attribute will be
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matched rather than the attribute itself.
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target_regex If true, regular expression matching will
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be used on the target role/attribute.
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Obeys target_indirect option.
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tclass The object class(es) to match.
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tclass_regex If true, use a regular expression for
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matching the rule's object class.
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default The name of the default role to match.
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default_regex If true, regular expression matching will
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be used on the default role.
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"""
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self.policy = policy
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self.set_ruletype(ruletype)
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self.set_source(source, indirect=source_indirect, regex=source_regex)
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self.set_target(target, indirect=target_indirect, regex=target_regex)
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self.set_tclass(tclass, regex=tclass_regex)
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self.set_default(default, regex=default_regex)
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def results(self):
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"""Generator which yields all matching RBAC rules."""
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for r in self.policy.rbacrules():
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#
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# Matching on rule type
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#
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if self.ruletype:
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if not r.ruletype in self.ruletype:
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continue
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#
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# Matching on source role
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#
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if self.source and not self._match_indirect_regex(
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r.source,
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self.source,
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self.source_indirect,
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self.source_regex,
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self.source_cmp):
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continue
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#
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# Matching on target type (role_transition)/role(allow)
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#
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if self.target and not self._match_indirect_regex(
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r.target,
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self.target,
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self.target_indirect,
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self.target_regex,
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self.target_cmp):
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continue
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#
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# Matching on object class
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#
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if self.tclass:
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try:
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if not self._match_object_class(
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r.tclass,
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self.tclass,
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self.tclass_regex,
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self.tclass_cmp):
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continue
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except InvalidRuleUse:
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continue
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#
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# Matching on default role
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#
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if self.default:
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try:
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if not self._match_regex(
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r.default,
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self.default,
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self.default_regex,
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self.default_cmp):
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continue
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except InvalidRuleUse:
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continue
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# if we get here, we have matched all available criteria
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yield r
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